UWB Occupant Detection Using Multi-Decision Analysis to Cut Memory

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Solution Overview

Problem

Existing occupant detection systems in motor vehicles struggle to reliably distinguish between a person, an animal, and luggage, and require large memory and resources due to complex ultra-wideband (UWB) sensor technology.

Innovation Solution

A method and system using UWB transmitting and receiving devices to generate and analyze data streams with multiple decision units and logic devices, employing artificial intelligence to create analysis statements directly from the data stream, reducing the need for memory and enhancing detection reliability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If complex UWB sensor technology with multiple reflection images is used for occupant detection, then detection reliability is improved, but memory requirements increase significantly (to more than 500 KB)

Engineering Contradiction:
Improvedetection reliabilityVSAvoidmemory requirements
Core Design Contradiction:
ReliabilityVSQuantity of substance

Solution Approach 1:

The patent extracts only the essential information from the complete reflection images by using decision criteria that analyze specific characteristics (such as position, size, shape) of detected objects. Instead of storing and processing the entire reflection image database, the system stores and processes only the extracted analysis statements and decision criteria, significantly reducing memory requirements while maintaining detection reliability.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The patent segments the occupant detection task into multiple independent decision units, each responsible for analyzing specific aspects of the reflection images (e.g., person detection, animal detection, luggage detection). Each decision unit processes data streams independently and creates analysis statements separately, allowing for more efficient memory usage and processing.

Inventive Principle:
Principle #1Segmentation

2Measurement precision

If multiple reflection images are stored and analyzed by the evaluation device, then detection accuracy is improved, but device complexity and processing requirements increase

Engineering Contradiction:
Improvedetection accuracyVSAvoidprocessing complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The patent applies preliminary action by pre-defining decision criteria and reference characteristics for different types of occupants (persons, animals, luggage) before actual detection occurs. The evaluation device stores these pre-established criteria rather than storing complete reflection images, and uses them to quickly analyze data streams in real-time, reducing processing complexity while maintaining accuracy.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

Instead of storing complete reflection images (which would require large memory and processing resources), the patent creates simplified copies or representations of the essential features - namely, analysis statements that capture the key characteristics of detected objects. These analysis statements serve as condensed representations that can be processed efficiently while maintaining the necessary detection accuracy.

Inventive Principle:
Principle #26Copying

3Device complexity

If pressure sensors are used to detect occupants, then system simplicity is maintained, but the ability to distinguish between person, animal, and luggage is lost

Engineering Contradiction:
Improvesystem simplicityVSAvoiddetection specificity
Core Design Contradiction:
Device complexityVSReliability

Solution Approach 1:

The patent replaces the simple pressure sensor system with a UWB-based electromagnetic field detection system. This substitution enables the system to distinguish between different types of occupants (persons, animals, luggage) by analyzing the reflection characteristics of electromagnetic waves, while still maintaining relatively simple system architecture through the use of decision units and analysis statements.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Ensures fast and reliable detection of occupants or objects in vehicles with reduced memory requirements, improving efficiency and reducing time to generate valid detection evaluations.

Implementation Method 1

sending a scanning signal into an interior of the motor vehicle by a UWB transmitting device of the detection system

Methodology Applied
Scientific EffectUltra-wideband electromagnetic radiation: Electromagnetic Induction

Implementation Method 2

receiving the scanning signal by a UWB receiving device of the detection system

Methodology Applied
Scientific EffectElectromagnetic signal reflection: Reflection

Data Source

PatentUS20250347796A1Occupant detection with reduced memory space
Publication Date: 2025.11.13 HELLA GMBH & CO KGAA
  • US20250347796A1 patent drawing
  • US20250347796A1 patent drawing
  • US20250347796A1 patent drawing

AI summary

The present invention relates to a method for detecting an occupant of a motor vehicle. The method includes: sending a scanning signal into an interior of the motor vehicle by a UWB transmitting device; receiving the scanning signal by a UWB receiving device; forwarding the received scanning signal from the UWB receiving device as a data stream to an evaluation device; creating a first analysis statement by means of a first decision unit of the evaluation device by analyzing the data stream on the basis of a first decision criterion; creating a second analysis statement by means of a second decision unit of the evaluation device by analyzing the data stream on the basis of a second decision criterion; and generating a detection evaluation by a logic device of the evaluation device by combining the first analysis statement with the second analysis statement.